Plans:
  @msagentenvironment( associateWith("merlin") );
  @msagentenvironment( show("yes") );
  @msagentenvironment( moveTo("400", "300", "500") )
  
PC-rules:
  message( S, inform, La, On, say( "hello" ) ) <- true |
  {
    @msagentenvironment( speak("Hello") );
    @msagentenvironment( speak(S) );
    @msagentenvironment( perform("wave") );
    send( S, inform, say( "hello" ) )
  }
  message( S, inform, La, On, say( "goodbye" ) ) <- true |
  {
    @msagentenvironment( speak("So much for the conversation...") );
    @msagentenvironment( think("How does the disappear trick work again?") );
    @msagentenvironment( perform("read") );
    @msagentenvironment( speak("Ah!") );
    @msagentenvironment( hide("yes") )
  }
